CSS Flexbox Playground

What is CSS Flexbox Playground?

CSS Flexbox Playground demonstrates how direction, justification, alignment, and gap affect items inside a flexible container. It is designed for one-dimensional interface structures such as navigation bars, button groups, rows, columns, centering, and components whose item sizes can change with content.

How to use CSS Flexbox Playground

Change flexbox properties in the visual controls, observe the layout, and copy the generated CSS when the arrangement matches your goal.

When is CSS Flexbox Playground useful?

CSS Flexbox Playground is useful when learning Flexbox, debugging alignment, or prototyping responsive component layouts.

Example

A practical example is testing justify-content and align-items values until a row of controls is centered correctly.

Practical notes

Choose Flexbox when layout primarily follows one axis; use CSS Grid when rows and columns must coordinate together. After copying the generated CSS, test long labels, missing items, wrapping, narrow screens, and different writing directions.